一、报错内容
org.springframework.beans.factory.BeanCreationException: Error creating bean with name'authController':Injection of autowired dependencies failed;nested exception is java.lang.IllegalArgumentException: Could not resolve placeholder'auth.username'invalue"${auth.username}"at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:405)~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1422)~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:594)~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517)~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323)~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321)~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:879)~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:878)~[spring-context-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:550)~[spring-context-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141)~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747)~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215)~[spring-boot-2.2.5.RELEASE.jar:2.2.5.RELEASE]at com.xafande.atc.aftnsocket.AftnsocketApplication.main(AftnsocketApplication.java:12)~[classes/:na]Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder'auth.username'invalue"${auth.username}"at org.springframework.util.PropertyPlaceholderHelper.parseStringValue(PropertyPlaceholderHelper.java:178)~[spring-core-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.util.PropertyPlaceholderHelper.replacePlaceholders(PropertyPlaceholderHelper.java:124)~[spring-core-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.core.env.AbstractPropertyResolver.doResolvePlaceholders(AbstractPropertyResolver.java:236)~[spring-core-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.core.env.AbstractPropertyResolver.resolveRequiredPlaceholders(AbstractPropertyResolver.java:210)~[spring-core-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.context.support.PropertySourcesPlaceholderConfigurer.lambda$processProperties$0(PropertySourcesPlaceholderConfigurer.java:175)~[spring-context-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.beans.factory.support.AbstractBeanFactory.resolveEmbeddedValue(AbstractBeanFactory.java:909)~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1228)~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1207)~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:640)~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:130)~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:399)~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]...17common frames omitted Disconnected from the target VM, address:'127.0.0.1:51727', transport:'socket'Process finished withexitcode1二、思路分析
报错的是两个@Value这里，很明显，咱们遇到的是一个spring管理注入失败的问题。
三、 解决报错
试了一下 可以把中间替换成:
